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W. PAUL.

DEVICE. FOR. CONNECTING WIRES IN ELECTRICAL APPARATUS. No. 255,661. Patented Mar. 28,1882.

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DEVICE FOR' C'ONNECTINGWIRES IN ELECTRICAL, APPARATUS.

SPEQIFICATION forming part of Letters Patent No. 255,661, datedjMareh 2 8, 1882. Applicationlih-d-Januarvztfi, l- (No model.)

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lle it known that i. In. lAlZL, of Ansonia, in the county of New Haven and State of Connecticut, have invented a new lm n'ovcment in Attaching (omit-(ling Wires in lilectrical,.-\pparatns: and l.do herebvdeclare thetbllowing, when taken in connection with accompanying drawings and the letters of reference marked thereon, to heat full, clear, and exact descriptionot the same, and'whieh said drawings constttute part of this specification, and

Figure l, a perspective view; Fig. :2, alongitudiual section; Fig. 3, a transverse section.

This invention relates to an improvement in attaching-wires in electrical apparatus. Usu- 7 ally the end of the wire is inserted into a hole the aperture to be'made for the wire, and so' as to cut into the portion where that aperture made to receive it, thena set-screw brought; to bear upon the surface of the wire, so as to bind it in place. This unavoidably indcnts the wire, causing it. frequently to break at that point, and bringing whatever strain there may be upon the wire on that portion only which is beneath the end or point of the screw.

The object of this invention is 'to construct a clamp for the wire which will notaflcct the surface, and take abcaring overa considerable extent of that surface; and it consists in the arrangement of a cylindrical bearing-piece parallel with the aperture into which the wire is to bcintroduced, and cutting into that aperture, the aperture for the wire extending into the surface of the said c lindrical bearing, the opening made to receive the bearing-piece being slightly larger in diameter than the bearing-piece, and a set screw or clamp arranged to'force said bearing-piece upon the wire, as more fully hereinafter described.

In the illustration I represent the attachment as made in connecting one of the wires in an electric machine, 1: representing the wire. I tirst bore a hole, (1, near to and parallel with for the wire is to be made." This hole. I: is of larger diameter than the wire. into this hole I), 1 place a cylindrical bearing-piece, d, of

slightly smaller diameter than' the hole, so

that there may be a little pla to this bearing- 1 piece. This bearing-piece. is secured by a-setscrew, c, inserted to bear thereon, the pointot' the screw entering a-corresponding eavit v, l'. iu' the hearing-piece; and in orderto hear to ward the wire the bearing-piece thus held I bore the aperture h for the wire, cutting into the bearing-piece, so that a part of the apertlu'c'i'or the wire is in the part to which the wire isto be attached and the remainder in said bearing-piece. The screw loosened, the

end of the wire is inserted into the-aperture h; then the bearing-piece forced down upon it clamps upon the .wire throughout the length of the bearing-piece. surface of the wire in the slightest degree, but holds it firmly and brings the. straiuupon the whole-length of the bearingpicceinstead of upon a single. point, as when the screw only is used. The extension of- .tbe screw into the hearing-piece pre\"-e 'ntsthe accidental removal of. that piecejwhen, not clamped upon the wire.

By making the bearing-piececylindrical, so

that only a round hole isrequiredto be bored for its introduction andiseat, the expense is so slight in addition to what is required for the screw as not to be worthy of consideration. certainl when the advantages of this Im-llnul of attaching the wire over the previous set screw arrangement are considered.

I claim 1; The herein-described device t'orconm-ct in g wires inelectrical apparatus, consisting in the cylindrical bez-tring-pieec arranged in a cone spondinglyshaped opening parallel with the wire-aperture, a portion of t he \\'it'c-,apelt ure being formed in the said cylimlrical bearing-piece, and mechanism, substantially such as .described, to clamp the said lu-aring-piece upon the wire, substantially as described.

.3. The herein-described device for connecting wires in electrical apparatus. consisting in the cylindrical bearing-piece arranged in a. correspondingly-shaped opening arallel with the wire-aperture, a portion of the wire-apertnre being fornn-d in thesaid-e lindrical la-ar; ing-piece, with a set screw. its end resting in a cavity in the surface of the ln-aring-piece. su stantially as and for the purpose described.

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